This series is ok to me, not great Just ok.
There's stuff thats dumb and stupid like sometines he's against killing someone for dumb reasons but he's fine with It when he's pissed. There's also some plots that the development is Very childish.
I also feel that the author tries too hard to make interesting the Full tanker job to only use shield and nothing else, in reality Its not that interesting the only cool things are ultimate moves he should not use and are only used for Boss battles. Things that could make his character more interesting in battle like support Magic its rarely used and not further developed, and now martial arts thats something he could use he has no talent and gave up. Sigh... At least secondary characters are cool